updates NM submodule to master
updates NM submodule to master

endaga/openbts,WindyCitySDR/openbts,WindyCitySDR/openbts,endaga/openbts,endaga/openbts,WindyCitySDR/openbts,endaga/openbts,endaga/openbts,WindyCitySDR/openbts,WindyCitySDR/openbts